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Finding the Fourth Proportional to 218,660.72, 327,991.80 and 68,915.12

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Solution

The fourth proportional to 218,660.72, 327,991.80 and 68,915.12 is: 103,372.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,660.72 : 327,991.80 = 68,915.12 : x
  2. Step 2: Convert to fraction form
    218,660.72/327,991.80 = 68,915.12/x
  3. Step 3: Cross multiply
    218,660.72x = 327,991.80 × 68,915.12
  4. Step 4: Simplify right side
    218,660.72x = 22,603,594,256.02
  5. Step 5: Solve for x
    x = 22,603,594,256.02/218,660.72
  6. Step 6: Final answer
    x = 103,372.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.